Furnace



(No Model.)

A. J. HOLDEN.

FURNACE.

No. 365,071. Patented June 21, 1887.

m I "IE1" IL! L Y wwmoow UNITED STATES AMORY J. HOLDEN, OF OAKHAM,MASSACHUSETTS.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 365,071, dated June 21,1887.

Serial No. 226,618. (No model.)

To aZZ whom it may concern.-

Be it known that I, AMonY J. HoLDEN, a citizen of the United States,residing at Oakham, in the county of \Vorcester and State ofMassachusetts, haveinvented certain new and useful Improvements inHeating-Furnaces, of which the following is a specification, referencebeingv had therein to the accompanying drawings.

The object of my invention is to provide aheating-furnaee (moreparticularly adapted for burning wood as fuel) which may be constructedat a comparatively small cost, and by which the largest possible amountof heat for warming a building can be obtained from a given amount offuel.

In the accompanying drawings, Figure 1 is a side view, with the housingor inclosingjacket partly broken away, of my improved furnace,- and Fig.2 is a front end view of the same. i

A denotes the fire drum or cylinder, and B the radiating cylinder placedabove the firedrum, these cylinders being connected at their rear endsby a smoke-pipe, G, and the radiating drum opening at its forward endinto the smoke-stack D. The drums A and B are of sheet metal, (whichwill vary in thickness according to the size of the apparatus,) and areprovided at their front ends with cast-iron rims a b, secured to flangeson the drums by bolts 0, the said rims securing the heads of the drumswith almost air-tight joints, and the rear ends of the drums may besimilarly constructed, if desired.

The fire-drum A is provided at its frontend with a door, E, which isopened to introduce the fuel, and with a sliding or other similardamper, F, and the radiating drum is pro vided at its forward end with acheck-draft door, G, which may be opened more or less, when desired.

The heating-drums are inclosed within a housing or jacket, H, which willpreferably be of brick, as shown, unless it is desired to heat thecellar or basement where the furnaceis located, in which case the saidjacket may be of galvanized sheet-iron, the said housing or jacketforming the heating-chamber I outside of the drums. The housing H hassuitable openings, J, at its bottom for the admission of the cool air,said openings being made to communicate with the open air in anysuitable or well-known manner, if desired. The said housing is alsopreferably provided at its rear end with a door, K, (indicated by dottedlines in Fig. 1,) which may be opened to give access to the drums, andthe latter may also be inspected through the doors E and G at theirfront ends.

To give the air to be heated a circuitous course as it rises, so as toenable it to absorb a large amount of heat from the drums withoutrequiring the latter to be overheated, I provide the heati ng-ch amber Iwith air-diverting plates or partitions L L L, which may be let into thebrickwork of thellousing orjacket H, as shown, and which may also beattached by small brackets (l to the drums. The plates or partitions Lextend from the fire-drum A to the side walls of the housing II, andfrom the rear end of the heating-chamber I nearly to the forward endthereof, and the plates L are similarly arranged relative to theradiating drum I The plate or partition Lextends entirely across theheating-chamber between the drums A and B, and from the forward end ofthe said chamber rearward nearly to the connection smoke-pipe C at therear ends of the said drums. Thus the rising air to be heated will becaused to pass to the forward end of the heating-chamber, then to therearward end thereof, and then again to the for ward end before itfinally passes upward into the hot-air pipes M at the top of the housingH. The bricks forming the top of the said housing are shown in thedrawings as being supported by iron bars 0, extending from one side wallof the housing to the other.

lVith my furnace constructed in the manner above described a very largeproportion of the heat of the fuel passes through the sheet-metal drums,and is absorbed by the circuitously-moving air passing upward throughthe heating-chamber, so that the said drums need never be heated redhot, and they will therefore last a long time without being burned out.Moreover, the brick housing or jacket II will absorb a large quantity ofheat when fresh fuel has been supplied to the fire-drum and the tire isthe hottest, and this heat will again be given out when the fire getslow, so that the heat supplied to the building will be more or lessregulated by the brick-work sur- ICO rounding the heating-chamber, andthus the heat supplied from the wood fire (for which my furnace is moreparticularly intended) will approximate in steadiness the heat fromacoal-' burning furnace. If, from any reason, it be comes necessary toremove the fire and radiating drums from their housing, this can bereadily done by removing a small portion of the front brick-work.

From the foregoing it will be apparent that the large amount of heatradiating surface afforded by my drums and the circuitous course whichthe air must necessarilyfollow in pass ing through the heating-chamber,as well as from the comparatively thin material of which the drums arecomposed, enables my furnace to combine a great heating capacity withecon omy of fuel, while the cost of construction thereof iscomparatively small, all of which has been demonstrated practically.

I do not wish to be understood as claiming, broadly, a heating-furnacecomprising radiating and heating drums, or a heating-furnace having fireand heat radiating drums or chambers inclosed within a brick-Workhousing or jacket, or aseries of air retarding or diverting plates ordiaphragms within a heating-chamber, my invention consisting in theparticular arrangements and combination of parts here inafter indicatedby my claims.

Having thus described my invention, I claim and desire to secure byLetters Patent 1. The combination, with the fire-drum A I and theradiating drum B, above the said firedrum and connected therewith at itsrear end, of the enveloping housing or jacket H, forming theheating-chamber I, the air-diverting plates or partitions L and Lextending from the rear end of said chamber nearly to the front endthereof, and from the drums A and B to the side walls ofthe saidhousing, and the air-diverting plate or partition L, extending entirelyacross said chamber and from the front end thereof nearly to the rearend of said drums, substantially as set forth.

2. The combination, with the sheet-metal fire-drum A, having the door Eand the damper F, of the sheet-metal radiating drum 13, above the saidfire-drum and connected therewith at its rear end, the latter drumhaving at its forward end a smoke stack or pipe and a checl; draft-door,the enveloping brickwork housing or jacketH, forming the heating-chamberI, the air-diverting plates or partitions L and L extending from therear end of the said chamber nearly to the front end thereof, andfromthe drums A and B to the side walls of the said housing, and theair-diverting plate or partition L, extending entirely across the saidchamber and from the front end thereof nearly to the rear ends of thesaid drums, substantially asset forth.

In testimony whereof I affix my signature in presence of two witnesses.

. AMORY J. HOLDEN.

\Vitnesscs:

IoNE E. HOLDEN, JEssE ALLEN.

